--  @testpoint:opengauss关键字account(非保留)，作为函数名
--关键字不带引号-成功
drop function if exists account;
create function account(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function account;

--关键字带双引号-成功
drop function if exists "account";
create function "account"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function "account";

--关键字带单引号-合理报错
drop function if exists 'account';
create function 'account'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带反引号-合理报错
drop function if exists `account`;
create function `account`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/